14209 IUPAC Gold Book - helix pitch 10.1351/goldbook.14209 14209 current 1 Distance between successive helical windings projected on the chain axis. The value of \(p\) is obtained from the equation \[p = \frac{c}{N}\] where \(c\) is the chain identity period and \(N\) is the number of helical windings in \(c\). PAC, 2011, 83, 1831. 'Definitions of terms relating to crystalline polymers (IUPAC Recommendations 2011)' on page 1841 (https://doi.org/10.1351/PAC-REC-10-11-13) https://goldbook.iupac.org/terms/view/14209/html https://goldbook.iupac.org/terms/view/14209/json https://goldbook.iupac.org/terms/view/14209/plain Citation: 'helix pitch' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.14209 The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms. If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using. 2026-06-29T00:19:38+00:00